Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zaphod.mps.ohio-state.edu!mips!ultra!marc
From: marc@mercutio.ultra.com (Marc Kwiatkowski {Host Software-AIX})
Newsgroups: comp.unix.aix
Subject: RE: Debug and error messages in AIXv3 device drivers...
Message-ID: <1991May24.072636.331@ultra.com>
Date: 24 May 91 07:26:36 GMT
Sender: marc@ultra.com (Marc Kwiatkowski {Host Software-AIX})
Distribution: comp
Organization: Ultra Network Technologies
Lines: 28


To answer my own question, sort of, it seems to me that it might be
possible to get around the absence of vsprintf by calling _doprnt
directly.  Disassembling the kernel version of _doprnt leads me
to believe that the parameter list is as follows:

     int
     _doprnt(fmt, ap, ptr)
     char *fmt
     va_list *ap
     char *ptr;

ptr is not a pointer to a FILE handle, but merely the
buffer in which to place the formatted output, thus
it is merely a rearrangment of the sprintf parameter
list.  Can anyone comfirm this?

_doprnt is not exported in the standard /lib/kernex.exp export
file, so it is necessary to add it to a homebrewed kernex.exp.
I believe this will work, but I'll find out for sure soon
enough.


-- 
        Marc P. Kwiatkowski			Ultra Network Technologies
        Internet: marc@ultra.com		101 Daggett Drive
        uucp: ...!ames!ultra!marc		San Jose, CA 95134 USA
        telephone: 408 922 0100 x249